<?php 
//http://parkson.omnimkt.com/api/pre_authcode.php
$get_access_token=json_decode(file_get_contents('./log/component_access_token.json'), true);
$component_access_token=$get_access_token['component_access_token'];
$url='https://api.weixin.qq.com/cgi-bin/component/api_create_preauthcode?component_access_token='.$component_access_token;
$appId = "wx82aa345f1fb8714b";
$data='{
"component_appid":"'.$appId.'" 
}';
$res = json_decode(http_request($url, $data), true);
var_dump($res);
file_put_contents('./log/pre_auth_code.json', json_encode($res));


function http_request($url, $data = null)
{
    $curl = curl_init();
    curl_setopt($curl, CURLOPT_URL, $url);
    curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, FALSE);
    curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, FALSE);
    if (!empty($data)){
        curl_setopt($curl, CURLOPT_POST, 1);
        curl_setopt($curl, CURLOPT_POSTFIELDS, $data);
    }
    curl_setopt($curl, CURLOPT_RETURNTRANSFER, TRUE);
    $output = curl_exec($curl);
    curl_close($curl);
    return $output;
}